13424210321 has 4 divisors (see below), whose sum is σ = 13426857444. Its totient is φ = 13421563200.

The previous prime is 13424210297. The next prime is 13424210339. The reversal of 13424210321 is 12301242431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8251723921 + 5172486400 = 90839^2 + 71920^2 .

It is a cyclic number.

It is not a de Polignac number, because 13424210321 - 2¹⁸ = 13423948177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13424213321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315940 + ... + 1326101.

It is an arithmetic number, because the mean of its divisors is an integer number (3356714361).

Almost surely, 2^13424210321 is an apocalyptic number.

It is an amenable number.

13424210321 is a deficient number, since it is larger than the sum of its proper divisors (2647123).

13424210321 is an equidigital number, since it uses as much as digits as its factorization.

13424210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647122.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 13424210321 its reverse (12301242431), we get a palindrome (25725452752).

The spelling of 13424210321 in words is "thirteen billion, four hundred twenty-four million, two hundred ten thousand, three hundred twenty-one".